<html>
  <head>
    <style>
      body {
        background-color: teal;
      }
    </style>
  </head>
  <body>
    <script type="text/javascript">
      const elm = parent.document.getElementById('testSrcChange2');
      elm.textContent = 'src-change2';
      elm.className = 'testSrcChange';
    </script>
  </body>
</html>
